Q: Which of the following equations correctly represents the process of photosynthesis occurring in chloroplasts?

$$\text{solar energy} + \text{CO}_2 + \text{H}_2\text{O} \rightarrow \text{carbohydrate} + \text{O}_2$$

Q: Which of the following is a correct sequence of the central dogma of molecular biology?

$$\text{DNA} \rightarrow \text{mRNA} \rightarrow \text{protein}$$

Question 1

Which of the following statements best explains why cells are generally small in size?

Accepted Answer

Small cells have a larger surface-area-to-volume ratio, which increases the efficiency of material exchange with their environment.

Question 2

A scientist is using a microscope to observe two cellular granules that are 0.1 μm apart. Which type of microscope would allow her to distinguish these granules as separate objects?

Accepted Answer

Transmission electron microscope (TEM)

Question 3

Which of the following is NOT a component of the cell theory?

Accepted Answer

All cells contain a nucleus.

Question 4

A bacterial cell is found to have a thick, well-organized layer outside its cell wall that is resistant to removal. This structure is most likely a:

Accepted Answer

Capsule

Question 5

Which of the following best describes the endosymbiotic theory?

Accepted Answer

Eukaryotic cells originated when a larger cell engulfed smaller prokaryotic cells that became mitochondria and chloroplasts.

Question 6

Which organelle is responsible for synthesizing proteins that are exported from the cell?

Accepted Answer

Rough endoplasmic reticulum

Question 7

A patient is diagnosed with a lysosomal storage disease. Which cellular process is most likely impaired?

Accepted Answer

Digestion of macromolecules

Question 8

Which of the following equations correctly represents the process of photosynthesis occurring in chloroplasts?

Accepted Answer

$$	ext{solar energy} + 	ext{CO}_2 + 	ext{H}_2	ext{O} ightarrow 	ext{carbohydrate} + 	ext{O}_2$$

Question 9

Which structure is found in plant cells but NOT in animal cells?

Accepted Answer

Central vacuole

Question 10

A mutation prevents the formation of microtubules in a cell. Which of the following processes would be directly affected?

Accepted Answer

Chromosome separation during cell division

Question 11

Which of the following best describes the function of peroxisomes?

Accepted Answer

They contain enzymes that break down hydrogen peroxide into water and oxygen.

Question 12

Which of the following is a correct sequence of the central dogma of molecular biology?

Accepted Answer

$$	ext{DNA} ightarrow 	ext{mRNA} ightarrow 	ext{protein}$$

Question 13

Which of the following structures is responsible for the movement of sperm cells?

Accepted Answer

Flagella

Question 14

A cell is observed to have a large number of smooth endoplasmic reticulum. Which function is this cell likely specialized for?

Accepted Answer

Detoxification of drugs

Question 15

Which of the following best explains why mitochondria and chloroplasts are considered semi-autonomous organelles?

Accepted Answer

They contain their own DNA and ribosomes.

Question 16

Which of the following is a function of the cytoskeleton?

Accepted Answer

Maintaining cell shape and enabling movement of organelles

Question 17

A cell is unable to produce vesicles. Which of the following processes would be directly impaired?

Accepted Answer

Transport of proteins between organelles

Question 18

Which of the following best describes the role of the Golgi apparatus in the cell?

Accepted Answer

It modifies, sorts, and packages proteins and lipids for transport.

Question 19

Which of the following is a unique feature of prokaryotic cells compared to eukaryotic cells?

Accepted Answer

They lack a membrane-bound nucleus.

Question 20

Which of the following structures is primarily responsible for the mechanical strength of skin cells?

Accepted Answer

Intermediate filaments (keratin)

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